基于比例柔度矩阵和改进模态曲率法的结构损伤定位研究

Study of structural damage identification based on the proportional flexibility matrix and improved modal curvature method

根据模态曲率法,并基于比例柔度矩阵,提出了一种利用平均柔度差的改进模态曲率法,结合某10层框架结构利用改进模态曲率法数值模拟损伤定位的结果,表明该改进模态曲率法能快捷简便解决柔度模态曲率法较难判断结构首尾单元损伤的问题,且保持模态曲率损伤定位的准确性。

According to the modal curvature methods, and based on the proportional flexibility matrix, an improved modal curvature method by using a new index called average flexibility difference is presented to identify the structural damages. The results of numerical simulation damage identification for a ten layers framework shows that the improved method can fast and easily detect the damage of the start and end element of structures by using the improved modal curvature method. This method also can identify the location of damages.